Fabrication and Characterization of the Ni-ScSZ Composite Anodes with a LSCM-CeO_2 Catalyst Layer in Thin Film SOFC

采用双层流延法制备Ni-ScSZ阳极支撑层-ScSZ电解质复合膜.在烧结的Ni-ScSZ阳极支撑层表面丝网印刷一层LSCM-CeO2阳极催化层,得到LSCM-CeO2/Ni-ScSZ功能梯度层阳极.研究表明,LSCM/CeO2比为1:3(bymass)的功能梯度层阳极Ni-ScSZ13具有较佳的性能.单电池在850℃以H2和乙醇蒸气作燃料的最大功率密度分别为710和669mW/cm2,而LSCM/CeO2为1:0(bymass)的功能梯度层Ni-ScSZ10作阳极的单电池,最大功率密度分别为521和486m W/cm2.两种阳极单电池,分别在700℃于乙醇蒸气中作长时间运行实验,X-射线能量散射分析表明Ni-ScSZ13阳极比Ni-ScSZ10阳极具有较好的抗碳沉积性能.Solid oxide full cell(SOFC) running directly on hydrocarbon fuels has attracted much attention in recent years.In this paper,a dual-layer structure anode was fabricated by tape casting and screen printing method.The addition of a LSCM-CeO2 catalyst layer to the supported anode surface yielded better performance in ethanol fuel.The maximum power density reached 710 and 669 mW/cm2 at 850 ℃ running on hydrogen gas steam and ethanol steam,respectively.No significant degradation in performance has been observed after 216 h of cell testing when the Ni-ScSZ13 anode was exposed to the ethanol steam at 700 ℃.Very little carbon was detected on the anode,suggesting that carbon deposition was limited during cell operation.Consequently,the LSCM-CeO2 catalyst layer on the supported anode made it possible to have good stability for long-term operation in ethanol fuel due to low carbon deposition.作者联系地址：上海交通大学燃料电池研究所;中国科学院过程工程研究所过程工程研发中心;Author's Address: 1.Institute of Fuel Cell,Shanghai Jiaotong University,Shanghai 200240,China;2.Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,Chin